Exhaust detector for stop motion mechanism in winding machines



Oct. 25, 1938.

E. R. ALDERMAN EXHAUST DETECTOR FOR STOP MOTION MECHANISM IN WINDINGMACHINES File d March 19, 1957 s Sheets-Sheet 1 INVENTOR Bl/GEA/EPALZJERMAA/ ATTORNEYS Oct. 25, 1938. R E A 2,134,017

EXHAUST DETECTOR FOR STOP MOTION MECHANISM IN WINDING MACHINES FiledMarch 19, 1937 3 Sheets-Sheet 2 INVENTOR EUGENE A. AwHMM/v ATTORNEYSOct. 25, 1938. R, AN 2,134,017

EXHAUST DETECTOR FOR STOP MOTION MECHANISM IN WINDING MACHINES FiledMarch 19, 1957 3 Sheets-Sheet 3 INVENTOR [A says 1? 1441259444 ATTORNEYSPatented Oct. 25, 1938 UNITED STATES EXHAUST DETECTOR FOR stroP Mo'rIoN"MECHANISM IN WINDING MACH ES Eugene R. Alderman, SouthHadley, Mass, as-

Signor to Foster Machine Company, Westfield,. Mass, a corporation ofMassachusetts Application March 19,

5 Claims.

My present invention relates to winding machines and has particularreference. to an automatic stop motion designed to stop the windingspindle of the machine upon the exhaust or near exhaust of the yarn ofthe supply bobbin for easy replenishment of the same.

Heretofore in machines of this character the usual drop wire detectorfor yarn breakage has been relied upon for stopping the winding spindlewhen the supply bobbin is exhausted, but in such an arrangement thestopping does not occur until the free end of the exhausted. yarn hasrun through the several guide devices and has been wound on the package.Under such circumstances the operator has to spend considerable time andlabor in hunting for the exhaust yarn end on the wound package and inmanually threading a new yarn end .through the guiding devices for beingtied to the exhaust end.

One of the principal objects of the present invention is to providemeans for stopping the winding spindle when the yarn on .the supplybobbin yarn that usually occurs. with the stoppingdevices heretoforeused. A

' The term bobbin will be referred to herein as meaning any form ofsupply such as bobbins, cops, quills, etc., and the term yarn will bereferred to as meaning any fiber used in textiles, such as wool, cotton,silk, etc., or any material being wound, such as wire, paper, glass,etc.

Referring to the drawings which show appreferred embodiment of myinvention:.

Fig. 1 is a side elevation of the stop motion for ,one of the windingunits of awinding machine, it being understood that such windingmachines usually comprise a large number of said units in line, each oneindependently operated;

- Fig. 2 is a detail view of the tripping mechanism of the stop motionin its position after being tripped by the near exhaust of the yarnsupply;

Fig. 3 is a detail plan, somewhat enlarged, of the detector andassociated parts of the tripping mechanism;

Fig. 4 is a fragmentary detail of the bobbin and ieeler end of thedetector looking in the direction of the arrow a in Fig. 2;

Fig.5 is a fragmentary detail in front elevation of the tripping latchand associated parts;

1937, Serial No. 131,804

Fig. 6 is a detail side elevation of said tripping latch and itssupport;

Fig. '7 isa detail side elevation'of a modification, via, the trippinglatch arranged for operation electrically; and I V Fig. 8 is adetailview of the supply bobbin pin showing the spring retainer forholding the bobbin thereon; I

Referring more particularly to the'drawings, the main name of thewinding machine is indicated at l and since theLwinding machine is ofusual character it need not be further described. Extending upwardlyfrom said frame is a supporting bracket 2- which carries a supporting,rod 3 running lengthwise of the winding machine for supporting parts ofseparate stop motion mechanisms of the several winding units.

Extending irom the rod 3 is the bobbin holder 5 havingadjustably mountedtherein bobbin pin 4 upon which is fixed the bobbin supporting base 5.The bobbin 5 rests on the base 6 and the latter is adjustable verticallyon bobbin pin. 4 so as to locate the supply bobbin 7 inthe desiredoperating position to bring the last remainingportion of yarn onthesupply bobbin into contact with the feeler-end E5 of the detector 8.Embracing the bobbin pin 4 is a spring retainer 9 formed preferably oftubular spring. steel having spaced bulbous portions it out by slits l Iso, as to compressibly fit within the bore of the bobbin]. This reitssupport and by adaption to bores of varying size keeps such bobbinsproperly centered with respect to pin A, (see Fig. 8).

V In the operation cfthe winding machine the yarn y is drawn, oi'f fromthe supply on the bobbin 1 over the upper end thereof and upwardly overan initial guiding device 33 comprising a tension roller and its wireguide, thence downwardly, under and over suitable friction guides 34,through the eye of a usual drop wire detector .35, and finally throughthe traversing guide 36 to the winding package E6! on the windingspindle l9. The winding spindle i9 and package of yarn thereon is drivenirictionally by a revolving driving roll 15 of the winding machinein.the usual manner.

It will be noted in Fig. 1 that the yarn guide device 33, which firstreceives the yarn from the bobbin '3 is located vertically above saidbobbin. The distance of said yarn guide 33 above the bobbin 1 isintended tobe represented in Fig. 1 as being sufficient to allow thestopping of the yarn y within said distance. The yarn guide 33 will beapproximately at the level of the average tainer 9 yieldingly but firmlyholds the bobbin on I exhaust point of yarn on the supply bobbin, the

winding machine will be stoppedbefore the exhaust end of yarn passesover the first guiding or tension device 33. This exhaust end willeither be in one or two remaining coils around the empty bobbin or atleast will be hanging in the space between the upper end of bobbin I andthe tension .device 33 when the winding machine stops, thereby allowingthe operator to quickly replace the empty bobbin with'a full bobbin, andto tie in the new end while standing in an upright position and withoutthe trouble of manually rethreading the new yarn end.

The stop motion and its tripping mechanism 4 for accomplishing theaforesaid result will now be described. Referring to Fig. 1, a brake andthrow 011 bar 69 extends beneath the winding spindle I9 and when tiltedupwardly lifts the winding spindle and its package off the driving rolland at the same time applies a braking action thereto. The brake bar 69is adjustably fastened to a tiltable angle member II pivoted at F6 onthe main frame and a spring I8 normallytends to rock said angle memberII in a counterclockwise direction to throw the brake bar 69 upwardly.During the running of the winding machine, aforward nose portion 11 ofthe angle member II rests against a blocking cam' I9 and the anglemember 'II is held inactive thereby, but is subject to the stress of itsspring I8. The cam block'l9 forms an integral part of a knock off plate80 which is pivoted at 8| on the main frame. The knock off plate 88carries on its underside a bell crank shaped pawl 82 or tripping memberpivoted at 83 on said knock off plate and one arm of said pawl 82carries the trip arm 29. The other armof said pawl 82 is adapted whenthe trip arm is released as hereinafter described, to fall into positionas shown in dotted lines in Fig. l, for being engaged by a tooth of theconstantly rotating kicker shaft I2 of the machine. When the pawl 82 isthus engaged by the kicker shaft it is thrown upwardly to the positionshown in Fig. 2, carrying the knock ofi plate 80 also upwardly so as todisengage cam block 19 from beneath nose 11 of the angle member II. Thisaction permits tilting of the latter under force of its spring 18, andthe winding spindle is stopped, as described. The positions of saidparts when the machine is stopped are shown in Fig. 2.

The tripping mechanism for holding and releasingtrip arm 29 and its pawl82 comprises the forward side of the trip arm 29 for holding andreleasing the same. The other arm 28 of the iatch,member I8 carries atits upper end an adjustable stud fixed in position by lock nut 3I and isadapted to be engaged by a curved tail portion I6 of the detector 8. Therocking move ment of the latch member I8 on its rod 28 is limited by astop piece 22 (see Figs. 5 and 6) which isa-djustably fixed on the rod29 by stud screw 23 and which has two spaced lugs 24 and 25, one at eachside of said latch member I8 to limit the movement thereof. A helicaltorsion spring 26 is located between one side of the stationary stoppiece 22 and the inner side of one bearing of latch member I8, and is sofastened as to give a rotary tendency to said latch member I8 to insurethe proper latching of the blade 21 under the trip arm 29. The spring 26also steadies and tends to prevent inaccurate disengagement of saidlatch 21 which might occur from the vibration or chattering of thewinding machine when running.

The detector 8, as shown in Fig. 3, it is the form of adouble armedlever pivotally mounted by, bearings I4 upon a stud I3 carried on anupward extension of the bracket I2 of the main frame The rear arm ortail portion I6 of detector 8 is curved as shown so as to bear againstthe stud 30 of the latch member I8. The for- Ward arm of the detector 8is in the form of a continuous length of. wire extending straight towardthe bobbin at right angles to the axis thereof and adjacent said bobbin,being bent into a V,-s haped portion in the same plane as the axis ofsaid bobbin with the apex I5 of said V in position to bear against theyarn on said bobbin,

7 and then extending beyond said bobbin with a finally'bent terminatingportion. The feeler-end of the detector is at the apex I5, and thepurpose of providing the V-shaped portion as shown 1 is to shape thedetector so as to facilitate the is mounted on the pivot stud I3 and isso ar-.

ranged as to act on the detector 8 and keep its feeler-end I5 constantlypressing against the yarn on the bobbin.

The operation of the tripping mechanism is as follows: Assuming that a.full bobbin is on its support as in Fig. 1, the detector 8 bears withits feeler-end I5 against the yarn on the bobbin with constant thoughlight pressure. The latch blade 2Iis located under the trip arm 29 andholds the 'knock off mechanism from being operated by the constantlyrotating kicker shaft I2. When the yarn on the supply bobbin 1 is nearlyexhausted as shown in Fig. 2, the detector 8 will have swung far-enoughso that its tail portion I8 'pressing against stud 38 of the latchmember I8 will rockthe latter and remove the latch 21 from beneath thetrip arm 29. This allows the latter to fall and permits the knock offaction to occur through the kicker shaft I2 as previously described, andstops the winding spindle. The empty bobbin may then be removed andreplaced by the full bobbin while the remnant portion of yarn on theempty bobbin is in convenient position for the operator to tie in theyarn of the new bobbin without any manual rethreading operation. 7

It is sometimes desirable to operate the tripping mechanismelectrically, and for this purpose the modification shown in Fig. 7 isprovided. The detector 8, trip arm 29 and latch member I8 are all asbefore described. Mounted in fixed position on the upward extension ofbracket I2 is an electromagnet E having its pole pieces 88 adjacent toan armature 8I fastened to the latch member 2'I. The energizing circuitof the magnet E is indicated by conducting wires 82, 83 and 84, whichcircuit comes from an electrical source of supply not shown, and isnormally interrupted between the contact 38 of the trip 21 and the tailportion l6 of the detector 8. When the feelerend l5 of the detector aspreviously described is allowed to move inwardly far enough due toexhaustion or near exhaustion of yarn on the bobbin to bring IS incontact with 3| the circuit is completed, the magnet E energized, andthe armature 8| attracted to the pole pieces 8E! for withdrawing thelatch 21 from beneath trip arm 28, thereby actuating the knock off inthe manner previously described. In the use of such an electricarrangement for the latch 21, it is possible to have the upper end ofsaid latch normally located a sufficient distance beneath the end oftrip arm 29 to prevent its being accidentally removed therefrom by theshaking or vibration of the machine. In the mechanical operation ofthese parts previously described, the tail portion I6 of the detector isconstantly bearing and gradually moving the latch 21 from beneath thetrip arm 29 and the last portion of this movement, just prior to releaseof latch 27 may sometimes be disturbed in its accuracy of timing therelease if the vibration is too severe. Consequently the electricalmethod of operating these parts provides for a greater degree ofaccuracy under abnormal conditions of machine vibration, inpredetermining the releasing point of the latch 21 since said latch isnot moved at all during the gradual exhausting of the yarn and is onlymoved at the conclusion of said exhaust when contact is made betweentail piece l6 and the stud 30.

I claim:

1. In a winding machine in combination, a winding spindle, a supplybobbin and a support therefor, an initial guide device for yarn locatedvertically at a suflicient distance above said supply bobbin to permitthe yarn running oif said supply bobbin being stopped Within saiddistance, whereby the end of a new bobbin supply may be tied to the endof the exhausted bobbin supply in the space between said bobbin supportand said initial guide device, a stop motion mechanism comprising meansto stop said winding spindle,- a feeler constantly pressing against thediminishing body of yarn on said bobbin, means operated by said feelerto actuate said stop motion mechanism when the yarn on said bobbin is ator near the point of exhaustion.

2. In a winding machine in combination, a winding spindle, a supplybobbin and a support therefor, an initial guide device for yarn locatedvertically ata suflicient distance above said supply bobbin to permitthe yarn running off said supply bobbin being stopped within saiddistance, whereby the end of a new bobbin supply may be tied to the endof the exhausted bobbin supply in the space between said bobbin supportand said initial guide device, a stop motion mechanism comprising meansto stop said winding spindle vertically at a sufiicient distance abovesaid supply bobbin to permit the yarn running off said supply bobbinbeing stopped within said distance, whereby the end of a new bobbinsupply may be tied to the end of the exhausted bobbin supply in thespace between said bobbin support and said initial guide device, a stopmotion mechanism comprising means to stop said winding spindle includinga constantly rotating kicker, a tripping member which upon beingreleased is actuated by said kicker, and a latch to hold said trippingmember against release, a feeler constantly pressing against thediminishing body of yarn on said bobbin, and means operated by saidfeeler to move said latch in release of said tripping member when theyarn on said bobbin is at or near the point of exhaustion.

4. In a winding machine having a winding spindle, a supply bobbin andsupport therefor, the combination with a stop'motion mechanism for saidwinding spindle, of detecting mechanism for causing the actuation ofsaid stop motion mechanism when the yarn on said bobbin is at or nearthe point of exhaustion, said detecting mechanism comprising a feelerfinger formed of a continuous length of wire extending at right anglesto the axis of said bobbin and bent into a V-shaped portion in the sameplane as said axiswith the apex of said V-shaped portion resilientlypressing against the diminishing body of yarn on said bobbin.

5. In a winding machine in combination, a winding spindle, a supplybobbin and a support therefor, an initial guide-device for yarn locatedvertically at a sufficient distance above said supply bobbin to permitthe yarn running ofl said supply bobbin being stopped within saiddistance, whereby the end of a new bobbin supply may be tied to the endof the exhausted bobbin supply in the space between said bobbin supportand said initial guide device, a stop motion mechanism comprising meansto stop said winding spindle including a tripping member and a latch forholding said tripping member against release, a feeler constantlypressing against the diminishing body of yarn on said bobbin, anelectromagnetic device for moving said latch in release of said trippingmember, an electric circuit and switch for said electromagnetic device,and

means operated by said feeler for actuating said switch when the yarn onsaid bobbin is at or near the point of exhaustion.

EUGENE R. ALDERMAN.

